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    <title>gl_GlobalInvocationID - OpenGL ES 3.1 Reference Pages</title>
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    <div class="refentry" id="gl_GlobalInvocationID">
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        <h2>Name</h2>
        <p>gl_GlobalInvocationID — contains the global index of work item currently being operated on by a compute shader</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>Declaration</h2>
        <code class="fieldsynopsis"><span class="modifier">in </span><span class="type">uvec3 </span><span class="varname">gl_GlobalInvocationID </span>;</code>
      </div>
      <div class="refsect1" id="description">
        <h2>Description</h2>
        <p>
            In the compute language, <code class="varname">gl_GlobalInvocationID</code>
            is a derived input variable containing the n-dimensional index of the
            work invocation within the global work group that the current shader is
            executing on. The value of <code class="varname">gl_GlobalInvocationID</code> is equal to
            <code class="varname">gl_WorkGroupID</code> * <code class="varname">gl_WorkGroupSize</code> + <code class="varname">gl_LocalInvocationID</code>.
        </p>
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      <div class="refsect1" id="versions">
        <h2>Version Support</h2>
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                <span class="bold"><strong>OpenGL ES Shading Language Version</strong></span>
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                <span class="bold"><strong>Function Name</strong></span>
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                <span class="bold"><strong>1.00</strong></span>
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                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.00</strong></span>
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                <th style="text-align: center; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.10</strong></span>
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                <td style="text-align: left; border-right: 2px solid ; ">
                  <code class="varname">gl_GlobalInvocationID</code>
                </td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; ">✔</td>
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      <div class="refsect1" id="seealso">
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="gl_NumWorkGroups.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_NumWorkGroups</span></span></a>,
            <a class="citerefentry" href="gl_WorkGroupID.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_WorkGroupID</span></span></a>,
            <a class="citerefentry" href="gl_WorkGroupSize.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_WorkGroupSize</span></span></a>,
            <a class="citerefentry" href="gl_LocalInvocationID.xhtml"><span class="citerefentry"><span class="refentrytitle">gl_LocalInvocationID</span></span></a>
        </p>
      </div>
      <div class="refsect1" id="Copyright">
        <h2>Copyright</h2>
        <p>
            Copyright <span class="trademark"/>© 2011-2014 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="link" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
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